Generate forward headers.

Install them in the proper directory.
Let cmake find them.

Done in 10 seconds using http://www.davidfaure.fr/2013/install_headers.{sh,pl}

CMakeLists.txt

@@ -16,6 +16,7 @@ find_package(Qt5Core ${REQUIRED_QT_VERSION} REQUIRED NO_MODULE)
 include(FeatureSummary)
 
 include(ECMSetupVersion)
+include(ECMGenerateHeaders)
 
 set(KF5_VERSION "5.0.0")
 

src/CMakeLists.txt

@@ -13,6 +13,8 @@ add_library(KF5ItemModels ${kitemmodels_SRCS})
 generate_export_header(KF5ItemModels BASE_NAME KItemModels)
 add_library(KF5::ItemModels ALIAS KF5ItemModels)
 
+target_include_directories(KF5ItemModels INTERFACE "$<INSTALL_INTERFACE:${INCLUDE_INSTALL_DIR}/kitemmodels>" "$<INSTALL_INTERFACE:${INCLUDE_INSTALL_DIR}/KItemModels>")
+
 target_link_libraries(KF5ItemModels PUBLIC Qt5::Core)
 
 set_target_properties(KF5ItemModels PROPERTIES VERSION   ${KITEMMODELS_VERSION_STRING}
@@ -20,16 +22,23 @@ set_target_properties(KF5ItemModels PROPERTIES VERSION   ${KITEMMODELS_VERSION_S
                                                EXPORT_NAME ItemModels
 )
 
+ecm_generate_headers(
+  KBreadcrumbSelectionModel
+  KCheckableProxyModel
+  KLinkItemSelectionModel
+  KRecursiveFilterProxyModel
+  KDescendantsProxyModel
+  KModelIndexProxyMapper
+  KSelectionProxyModel
+
+  REQUIRED_HEADERS KItemModels_HEADERS
+)
+install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/KItemModels DESTINATION ${INCLUDE_INSTALL_DIR} COMPONENT Devel)
+
 install(TARGETS KF5ItemModels EXPORT KF5ItemModelsTargets ${INSTALL_TARGETS_DEFAULT_ARGS})
 
 install(FILES
-  kbreadcrumbselectionmodel.h
-  kcheckableproxymodel.h
-  klinkitemselectionmodel.h
-  krecursivefilterproxymodel.h
-  kdescendantsproxymodel.h
-  kmodelindexproxymapper.h
-  kselectionproxymodel.h
   ${CMAKE_CURRENT_BINARY_DIR}/kitemmodels_export.h
-  DESTINATION ${INCLUDE_INSTALL_DIR} COMPONENT Devel
+  ${KItemModels_HEADERS}
+  DESTINATION ${INCLUDE_INSTALL_DIR}/kitemmodels COMPONENT Devel
 )